Moving from hot to cold — Question Bank (Cambridge) — Cambridge IGCSE Physics 0625 Revision Notes & Topical Questions

Cambridge Lower Secondary Stage 9

Question 1
Paper Ref: 5129/12_Winter_2024_Q32

The diagram shows three identical copper cups, each containing an identical thermometer. Each
cup also contains 50cm? of water, initially at 80°C.
Each cup has a different surface as shown.
thermometer
matt black matt grey shiny silver.
surface surface surface \
water
copper
cup
What is the experiment designed to distinguish between?
accurate and inaccurate thermometers
A
B good and bad absorbers of infrared radiation
C good and bad conductors of thermal energy
D
good and bad emitters of infrared radiation

Options:
A
B
C
D
Correct Key: D

Question 2
Paper Ref: 5129/12_Winter_2021_Q34

The diagram shows water boiling at the top of a boiling tube while an ice cube remains unmelted
at the bottom.
glass boiling tube
boiling water
heat
water
ice cube wire gauze
What makes this possible?
Glass is a good conductor of heat.
Glass is a poor radiator of heat.
Water is a good radiator of heat.
0 0O wD PY
Water is a poor conductor of heat.

Options:
A
B
C
D
Correct Key: D